Feeling emptiness in her sex life with her selfish and domineering husband, the wife, Mirai, has recently made it a daily routine to pleasure herself. Finding her own fingers insufficient, Mirai secretly ordered a vibrator online... but it was discovered by her father-in-law, Kouzou. "Could you show me how to use this, Mirai?" Kouzou presses Mirai. Driven mad with unfulfilled desires, Mirai is made to climax over and over again under Kouzou's forceful demands.
